Magnetic resonance imaging gradient modulation technique for motion artifact reduction and flow quantification

1988 ◽  
Vol 16 (4) ◽  
pp. 417-418
Author(s):  
Daniel J. Schneck ◽  
Jeffrey Lewis Duerk
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Motion Artifact ◽  
Flow Quantification ◽  
Artifact Reduction ◽  
Resonance Imaging ◽  
Modulation Technique ◽  
Imaging Gradient

Comparison of metal artifact reduction techniques in magnetic resonance imaging of carbon-reinforced PEEK and titanium spinal implants

2021 ◽  
pp. 028418512110290
Author(s):  
Georg Osterhoff ◽  
Florian A Huber ◽  
Laura C Graf ◽  
Ferdinand Erdlen ◽  
Hans-Christoph Pape ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Pedicle Screws ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Signal Loss ◽  
Resonance Imaging ◽  
Spinal Implants ◽  
Titanium Screws

Background Carbon-reinforced PEEK (C-FRP) implants are non-magnetic and have increasingly been used for the fixation of spinal instabilities. Purpose To compare the effect of different metal artifact reduction (MAR) techniques in magnetic resonance imaging (MRI) on titanium and C-FRP spinal implants. Material and Methods Rod-pedicle screw constructs were mounted on ovine cadaver spine specimens and instrumented with either eight titanium pedicle screws or pedicle screws made of C-FRP and marked with an ultrathin titanium shell. MR scans were performed of each configuration on a 3-T scanner. MR sequences included transaxial conventional T1-weighted turbo spin echo (TSE) sequences, T2-weighted TSE, and short-tau inversion recovery (STIR) sequences and two different MAR-techniques: high-bandwidth (HB) and view-angle-tilting (VAT) with slice encoding for metal artifact correction (SEMAC). Metal artifact degree was assessed by qualitative and quantitative measures. Results There was a much stronger effect on artifact reduction with using C-FRP implants compared to using specific MRI MAR-techniques (screw shank: P < 0.001; screw tulip: P < 0.001; rod: P < 0.001). VAT-SEMAC sequences were able to reduce screw-related signal loss artifacts in constructs with titanium screws to a certain degree. Constructs with C-FRP screws showed less artifact-related implant diameter amplification when compared to constructs with titanium screws ( P < 0.001). Conclusion Constructs with C-FRP screws are associated with significantly less artifacts compared to constructs with titanium screws including dedicated MAR techniques. Artifact-reducing sequences are able to reduce implant-related artifacts. This effect is stronger in constructs with titanium screws than in constructs with C-FRP screws.

Modal Analysis of Currents Induced by Magnetic Resonance Imaging Gradient Coils

2014 ◽  
Vol 50 (2) ◽  
pp. 945-948 ◽  
Author(s):  
Hector Sanchez ◽  
Michael Poole ◽  
Adnan Trakic ◽  
Fabio Freschi ◽  
Elliot Smith ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Modal Analysis ◽  
Resonance Imaging ◽  
Gradient Coils ◽  
Imaging Gradient

scholarly journals Improved Visualization of Juxtaprosthetic Tissue Using Metal Artifact Reduction Magnetic Resonance Imaging

2019 ◽  
Vol 54 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Pia M. Jungmann ◽  
Susanne Bensler ◽  
Patrick Zingg ◽  
Benjamin Fritz ◽  
Christian W. Pfirrmann ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Resonance Imaging

Motion Artifact in Magnetic Resonance Imaging: Implications for Automated Analysis

NeuroImage ◽  
2002 ◽  
Vol 16 (1) ◽  
pp. 89-92 ◽  
Author(s):  
Jonathan D. Blumenthal ◽  
Alex Zijdenbos ◽  
Elizabeth Molloy ◽  
Jay N. Giedd
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Automated Analysis ◽  
Motion Artifact ◽  
Resonance Imaging
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